Living with our genes pdf download

This guide harmonises the rules and guidance for A-level Biology and includes a full glossary of terms. Textbooks are also available from Oxford University Press. If you would like a closer look at the Oxford University Press textbook that supports this qualification, click on the link below.

This will allow you to create an account that will give you free access to a day online evaluation copy, meaning you can explore the resource and make sure it is right for you and your students. Help students prepare for their exams by accessing definitions to command words used in exams and other assessed tasks.

Prepare your students in exam technique with the help of exemplar student answers and examiner commentaries that show how examiners interpret the mark scheme. Exampro is an online database of AQA past questions mapped to the new international qualifications, enabling teachers to create their own resources and assessments.

Schools will be given an Exampro username and password when they are approved to teach our qualifications. If you have these you can log in now. If your school is approved to teach our qualifications and you do not know your username and password, contact us. This allows you to see which questions proved the most challenging, or how different classes performed, so you know what areas to focus on in following years. Use with our summer papers. Available exclusively for OxfordAQA schools.

Step-by-step instructions are included. These tests, created by senior examiners to ensure effective subject coverage, come with mark schemes and cover sheets. We will use your personal information to respond to your query and in accordance with our privacy policy. For full details on how your personal information will be used, stored and protected, and how to request further information from Oxford International AQA Examinations, please read our privacy policy.

Our timetable enables your students to take exams when they are at their freshest, so they can succeed to the best of their abilities. The best result for each unit will count towards the final qualification. Candidates who wish to repeat a qualification may do so by re-sitting one or more units. The common characteristics between tomato and potato will be maximum at the level of their a family b order c division d genus. Question: What is true for individuals of same species? Which one of the following organisms is scientifically correctly named, correctly printed according to the International Rules of Nomenclature and correctly described?

The system of classification based on evolutionary and genetic relationships among organisms, ignoring the morphological similarities or differences, is called a cladistics b phenetics c classical systematics d new systematics. Which one of the following animals is correctly matched with its particular taxonomic category?

Species are considered as a real basic units of classification b the lowest units of classification c artificial concept of human mind which cannot be defined in absolute terms d real units of classification devised by taxonomists.

Scientific name of Mango plant is Mangifera indica Linn. In the above name Santapau refers to a Variety of Mango b A taxonomist who proposed the present nomenclature in honour of Linnaeus c A scientist who for the first time described Mango plant d A scientist who changed the name proposed by Linnaeus and proposed present name. Which of the following is less general in characters as compared to genus? Sequence of taxonomic categories is a class—phylum—tribe—order—family—genus— species b division—class—family—tribe—order—genus—species c division—class—order—family—tribe—genus—species.

The term phylum was given by a Cuvier b Haeckel c Theophrastus d Linnaeus. A group of plants or animals with similar traits of any rank is a species b genus c order d taxon. A taxon is a a group of related families b a group of related species c a type of living organisms d a taxonomic group of any ranking. Read the following statements i Lower the taxon, more are the characteristics that the members within the taxon share. Which of the following statements are NOT correct?

Static concept of species was put forward by a de Candolle b Linnaeus c Theophrastus d Darwin. Choose the correct one i Growth cannot be taken as a defining property of living organism. The label of a herbarium sheet does not carry information on a date of collection b name of collector c local names d height of the plant.

Which one of the following is not a correct statement? One of the most important functions of botanical gardens is that a they provide a beautiful area for recreation b one can observe tropical plants there c they allow ex situ conservation of germplasm d they provide the natural habitat for wild life. Our teachers have developed really good Multiple Choice Questions covering all important topics in each chapter which are expected to come in upcoming tests and exams, as MCQs are coming in all exams now therefore practice them carefully to get full understanding of topics and get good marks.

Download the latest questions with multiple choice answers for Class 11 The Living World in pdf or read online for free. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Skip to content. Our teachers have provided here collection of multiple choice questions for Chapter 1 The Living World Class 11 Biology covering all topics in your textbook so that students can assess themselves on all important topics and thoroughly prepare for their exams The Living World Class 11 Biology Chapter 1 MCQ Questions with Answers We have provided below MCQs questions for Class 11 The Living World with answers which will help the students to go through the entire syllabus and practice multiple choice questions provided here with solutions.

Answer C. Answer B. If both copies have to be the same to see that trait, it is called recessive. For example, the gene for brown eyes is dominant while the gene for blue eyes is recessive, so if you get one copy of the brown eye gene from one parent and a copy of the blue eye gene from the other, you will have brown eyes.

You will only get blue eyes if you get 2 copies of the blue eye gene one from each parent. This classification applies to gene mutations as well.

If you only need to inherit one copy of a gene mutation to get a disease or syndrome, it is called dominant. If you need 2, it is called recessive. Gene mutations are discussed in the next section. Things are a little different in terms of genes on the X chromosome. Normally, we each have 2 sex chromosomes. Women have two X chromosomes, while males have one X chromosome and one Y chromosome. Since the Y chromosome contains different genes than the X chromosome, males have only one copy of the genes on the X chromosome.

For some of these, like color blindness, a female has to have 2 copies of the gene one on each X chromosome to get the condition. For a male though, he only has to have the gene on his one X chromosome. Unless you cut the DNA with restriction enzymes, it is too long and stringy to move through the pores of the gel. A scientist with a lab purified sample of genomic DNA might also try to sequence it or use it to perform a PCR reaction.

But, your sample is likely not pure enough for these experiments to really work. How is DNA extraction useful to scientists? When do they use such a protocol, and why is it important? The extraction of DNA from a cell is often a first step for scientists who need to obtain and study a gene. The total cell DNA is used as a pattern to make copies called clones of a particular gene. These copies can then be separated away from the total cell DNA, and used to study the function of that individual gene.

Once the gene has been studied, genomic DNA taken from a person might be used to diagnose him or her with a genetic disease.

Alternatively, genomic DNA might be used to mass produce a gene or protein important for treating a disease. This last application requires techniques that are referred to as recombinant DNA technology or genetic engineering. Unfortunately, a microscope will not allow you to see the double helical structure of the DNA molecule. You'll only see a massive mess of many, many DNA molecules clumped together. In fact, the width of the DNA double helix is approximately one billionth of a meter!

This is much too small to see, even with the most powerful microscope. Instead, a technique called X-ray crystallography can be used to produce a picture of the DNA molecule. Step 1: Blender Insanity! Step 2: Soapy Peas. Pour your thin pea-cell soup through a strainer into another container like a measuring cup. Add 2 tablespoons liquid detergent about 30ml and swirl to mix. Let the mixture sit for minutes. Why am I adding detergent? Step 3: Enzyme Power.

Step 4: Alcohol Separation. What is that Stringy Stuff? Try these ideas or some of your own: Experiment with other DNA sources. Blending separated the pea cells. To see the DNA, we have to break open these two sacks. We do this with detergent. Why detergent? How does detergent work?

Think about why you use soap to wash dishes or your hands. To remove grease and dirt, right? Soap molecules and grease molecules are made of two parts: Heads, which like water. Tails, which hate water. When detergent comes close to the cell, it captures the lipids and proteins. After adding the detergent, what do you have in your pea soup? The DNA in the nucleus of the cell is molded, folded, and protected by proteins. The meat tenderizer cuts the proteins away from the DNA.

I don't think I'm seeing DNA. What should I be looking for? What can I do to increase my yield of DNA? Understanding the Science behind the Protocol.